FAULT DETECTION SYSTEM AND METHOD FOR OVERSPEED PROTECTION SPEED SENSORS
First Claim
1. A fault detection system for an over-speed protection system of a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the system comprising:
- a first input configured to receive a first pulse train from the first speed sensor;
a second input configured to receive a second pulse train from the second speed sensor;
a third input configured to receive a third pulse train from the third speed sensor; and
a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train.
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Accused Products
Abstract
A fault detection system for an over-speed protection system of a rotating machine includes a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine. The system includes a first input configured to receive a first pulse train from the first speed sensor, a second input configured to receive a second pulse train from the second speed sensor, a third input configured to receive a third pulse train from the third speed sensor, and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train.
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Citations
20 Claims
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1. A fault detection system for an over-speed protection system of a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the system comprising:
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a first input configured to receive a first pulse train from the first speed sensor; a second input configured to receive a second pulse train from the second speed sensor; a third input configured to receive a third pulse train from the third speed sensor; and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A programmable logic device programmed to perform fault detection of an over-speed protection system for a rotating machine including a first speed sensor, second speed sensor, and third speed sensor sensing a speed of a shaft of the rotating machine, the device comprising:
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a first input configured to receive a first pulse train from the first speed sensor; a second input configured to receive a second pulse train from the second speed sensor; a third input configured to receive a third pulse train from the third speed sensor; and a processor configured to generate a shutdown signal for the rotating machine based on the first pulse train, the second pulse train, and the third pulse train. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, implemented by a processor, of detecting faults in an over-speed protection system of a rotating machine, the method comprising:
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determining whether a first pulse train is received from a first speed sensor sensing a first speed of a shaft of the rotating machine; determining whether a second pulse train is received from a second speed sensor sensing a second speed of the shaft; determining whether a third pulse train is received from a third speed sensor sensing a third speed of the shaft; and when a specified number of the first pulse train, the second pulse train, and the third pulse train are determined to not be received, outputting a shutdown signal based on processing the first pulse train, the second pulse train, and the third pulse train. - View Dependent Claims (18, 19, 20)
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Specification